A302887 Number of nX6 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 168, 818, 12782, 200186, 3452246, 60501563, 1073161270, 19073141368, 339253565677, 6036219398919, 107408100263993, 1911291205759074, 34011097898139499, 605224662587072998, 10769933859504334253

Offset

1,2

Comments

Column 6 of A302889.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..1..0..0..0..0. .0..1..1..0..0..0. .0..0..0..1..1..0. .0..0..0..1..1..1
..0..1..0..0..0..1. .0..1..1..1..0..0. .0..0..0..1..1..1. .0..0..0..1..1..1
..1..1..1..0..0..0. .1..1..1..1..0..0. .1..1..0..0..1..1. .1..1..1..1..0..0
..0..1..0..0..0..1. .1..1..1..0..0..0. .0..1..1..1..1..1. .0..1..0..0..0..1
..1..1..1..0..0..1. .0..1..1..1..0..0. .1..1..1..1..1..1. .0..1..0..0..0..0

Crossrefs

Cf. A302889.

Sequence in context: A245868 A251461 A110285 * A235071 A235064 A070835

Adjacent sequences: A302884 A302885 A302886 * A302888 A302889 A302890

Keyword

nonn

Author

R. H. Hardin, Apr 15 2018

Status

approved